From: Jens Axboe <axboe@kernel.dk>
Date: Fri, 1 Feb 2019 05:55:52 +0000 (-0700)
Subject: t/io_uring: verbose error for -95/-EOPNOTSUPP failure
X-Git-Tag: fio-3.13~4
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=154a95828fe08b01774b59602544de394b2d3aa6;p=fio.git

t/io_uring: verbose error for -95/-EOPNOTSUPP failure

If we fail with this error and polling is enabled, it's because the
file system hosting the file doesn't support polling. Let the user
know.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/t/io_uring.c b/t/io_uring.c
index 62b48e44..7c75c887 100644
--- a/t/io_uring.c
+++ b/t/io_uring.c
@@ -262,6 +262,8 @@ static int reap_events(struct submitter *s)
 			f->pending_ios--;
 			if (cqe->res != BS) {
 				printf("io: unexpected ret=%d\n", cqe->res);
+				if (polled && cqe->res == -EOPNOTSUPP)
+					printf("Your filesystem doesn't support poll\n");
 				return -1;
 			}
 		}